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dc.contributor.authorTam, Kuan Vai
dc.contributor.authorHood, Alan William
dc.contributor.authorBrowning, Philippa
dc.contributor.authorCargill, Peter
dc.identifier.citationTam , K V , Hood , A W , Browning , P & Cargill , P 2015 , ' Coronal heating in multiple magnetic threads ' , Astronomy & Astrophysics , vol. 580 , A122 .
dc.identifier.otherORCID: /0000-0003-2620-2068/work/58055183
dc.descriptionWe acknowledge the financial support of STFC through the Consolidated grant to the University of St Andrews.en
dc.description.abstractContext. Heating the solar corona to several million degrees requires the conversion of magnetic energy into thermal energy. In this paper, we investigate whether an unstable magnetic thread within a coronal loop can destabilise a neighbouring magnetic thread. Aims. By running a series of simulations, we aim to understand under what conditions the destabilisation of a single magnetic thread can also trigger a release of energy in a nearby thread. Methods. The 3D magnetohydrodynamics code, Lare3d, is used to simulate the temporal evolution of coronal magnetic fields during a kink instability and the subsequent relaxation process. We assume that a coronal magnetic loop consists of non-potential magnetic threads that are initially in an equilibrium state. Results. The non-linear kink instability in one magnetic thread forms a helical current sheet and initiates magnetic reconnection. The current sheet fragments, and magnetic energy is released throughout that thread. We find that, under certain conditions, this event can destabilise a nearby thread, which is a necessary requirement for starting an avalanche of energy release in magnetic threads. Conclusions. It is possible to initiate an energy release in a nearby, non-potential magnetic thread, because the energy released from one unstable magnetic thread can trigger energy release in nearby threads, provided that the nearby structures are close to marginal stability.
dc.relation.ispartofAstronomy & Astrophysicsen
dc.subjectSun: coronaen
dc.subjectSun: magnetic fieldsen
dc.subjectMagnetohydrodynamics (MHD)en
dc.subjectMagnetic reconnectionen
dc.subjectCoronal heatingen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleCoronal heating in multiple magnetic threadsen
dc.typeJournal articleen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.contributor.institutionUniversity of St Andrews. Applied Mathematicsen
dc.contributor.institutionUniversity of St Andrews. School of Mathematics and Statisticsen
dc.description.statusPeer revieweden

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